1. It comes with 510 thread.
2. Short-circuit protection and overcharge protection.
3. 5-Click Protection: To turn on, press button 5 times within 2 seconds. You will see white LED flash. To turn off battery, press manual button 5 times within 2 second as well, the white LED will flash! "5-click protection" can protect the battery from being activated when you do not want or do not use it. No more firing in your pocket!
4. 15 second cutoff time!
5. 3.4V constant voltage output battery.